Boston Celtics guard Jabari Bird choked his girlfriend multiple times, kicked her and prevented her from leaving his apartment before he collapsed in distress, prosecutors said at his arraignment Thursday.

Bird, 24, was held on $50,000 bail after not-guilty pleas to domestic violence-related charges were entered on his behalf.

Police spoke with Bird’s girlfriend, a student at a local college, at a city hospital after his arrest last Friday, prosecutor Khyati Short said during the hearing.

Bird choked the woman unconscious, threw her against the wall and dragged her by the ankles when she tried to leave his apartment in the Brighton neighborhood, police said.